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This article aims to introduce a projective synchronization approach based on adaptive fuzzy control for a class of perturbed uncertain multivariable nonaffine chaotic systems. The fuzzy-logic systems are employed to approximate online the uncertain functions. A Lyapunov approach is used to design the parameter adaptation laws and to demonstrate the(More)
In this paper, the projective synchronization problem of two fractional-order different chaotic (or hyperchaotic) systems with both uncertain dynamics and external disturbances is considered. More particularly, a fuzzy adaptive control system is investigated for achieving an appropriate projective synchronization of unknown fractional-order chaotic systems.(More)
The impact echo technique, has been used successfully for detecting flaws in many different types of concrete structures, including plate-like structures such as bridge decks, slabs, walls, beams, columns, layered structures and hollow cylindrical structures. In the used technique in this work (impact echo technique), a transducer is the sender and the(More)
An invisible robust, non blind watermarking scheme for digital images is presented. The proposed algorithm combines the Discrete Wavelet Transform (DWT) and the Bi-dimensional Empirical Mode Decomposition (BEMD). Unlike previous works where the watermark bits are embedded directly on the wavelet coefficients, the proposed scheme suggests rather the(More)
In this paper three images of Landsat Thematic Mapper and Enhanced Thematic Mapper plus TM/ETM+ data of 1987, 2001 and 2010 being used to analyze the urban changes in Algiers areas. The paper followed the expansion of urban tissue using the novel method of difference soil adjusted vegetation index DSAVI, difference normalized difference bult up index DNDBI(More)
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